“…Biological methods play an important role in ammonium removal from wastewater. The most common biotechnologies are microbiological nitrification, denitrification, and anammox processes, which sequentially convert ammonium to nitrite, nitrate, and finally to nitrogen gas or nitrous oxide (van Dongen et al, 2001;Fux et al, 2002;Green et al, 2002;Hibiya et al, 2003). These microbiological processes are slower and very sensitive to environmental conditions in comparison with chemical or physical removal of ammonium from wastewater.…”